Dead-weight gage-tester.



J. P. FISHER. DEA-D WEIGHT GAGE TESTER.

, I Q APPLICATION FILED AUG-12.4916. T 1,217,735. Patented Feb. 27,1917.

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' wdf' iziqg 1. P. FISHER. v DEAD WEIGHT GAGE TESTER.

I APPLICATION FILED AUG-1 2. I916. v I 1,217,735. Patented Feb. 27,1917.

2 SHEETS-SHEET 2.

of the gage tester and pressure medium to unretardedly drain back o ITEsrarns PATEN rm JAMES RFISI-IER, or BARTLEsvILL OKLAHOMA} if DEAD-WEIGHTGAGErTESTER.

To all whom it may concern Be it known that I, JA ES citizen of theUnited States, Bartlesville, in the county of and State of Oklahoma,have invented new and useful Improvements in Dead-Weight Gage-Testers,of Which the following is a specification.

This invention relates to a gage tester, and one object thereof is toprovidea' dead weight gage tester of a portable character comprising. initsequipment a plurality of calibrated weights that may be readilytransported with the testing mechanism and an inclosure easilyseparablefrom said mechanism and including means for accidental displacement ofthe weights from a predetermined stored position. A furresiding at therobject of the invention is to reduce'the proportions and minimize theparts of a gage tester ofthe type specified to such an extent as torender the same comparatively light and conveniently transportable Without detractingfrom the necessary pressure generation thereof andrequisite reliability in the'performance of its test functions. A-further object of the invention is to produce a tester in whichpressures may be developed through the direct action of Weightsto anydegree desired and togenerally improve the construction and organizationof the parts condense the several cooperating elements and principallyto arrange the reservoir for the pressure medium around the workingbarrel of the mechanism and to provide said barrel with openings indifferent parts thereof to permit the from the barrel into the reservoirwhen the piston has reached a certain elevation and also to recover anyleakage around the piston.

With these and other objects and advan-.

tages in view the invention consists in the therefor.

preferred construction and arrangement of the several parts which willbe more fully hereinafter described and claimed. I

In the draw ngs:

Figure 1 is a top plan view of the dead.

Weight of the invention and shown a base support forming part gagetesterembodying the features mounted upon of an inclosure Specification ofLetters Patent.

P. FisHER, a se Washington preventing Fig. 2. is a central longitudinalvertical ction of the tester showing the same fully inc'losed and readyfor transportation.

Fig. 3 is a transverse vertical sectiontaken in the plane of the line33, Fig. 1 y a Fig. 4 is a transverse vertical section taken in theplaneoftheline 4 4, Fig. 1.

Fig.5 is a sectional end elevation ofthe gage connection with gage deredwall for a purpose which will be I a portion of the pressure mediumconveying pipe connected thereto, parts of this Patented Feb. 2a; 1917.7 Application filed August 12, 19169 Serial No. 114, 6l6. r

presently explained. The operating mechal V nlsm of the tester ismounted port 6 and essentially comprises a pressure pump 8, a pressurebarrel orcylinder 9 with a surrounding reservoir 10, and a' gagetesting' connection 11, the said parts being in on the suplongitudinalalinement on the support 6 and 1 I the. pressure barrel or cylinder 9and resernate depressions and sockets l9andtop projections 20 formed asparts of the respective weights to provide for a snug stack associsoclosely fitted as shown, there being alter- I ationthereof relatively tothe bosses'16 and v l V at the ends thereof are screw rods 22 havingWeights from slipping Over the testing lower screw-threaded ends 23 toremovably engage screw sockets 24 in the centers of'the opposite ends ofthe base 5, the screw rods being provided withmilled heads25 and looselyextending through openings 26 -the base 5.

. by detaching sage 36 in the sage 37 The pipes the opposite end of theclosure and by means of which the said closure is firmly and re liablysecured in a removable manner to the base 5. The walls of the closureare preferably of such thickness as to take up the clearance 7 aroundthe support 6 and have the outer side and end surfaces of the closurecoinciding with the side and end edges of The closure at proper poi tsis provided with dependingpressure springs 27 which are secured to thetop thereof and are arranged to engage the uppermost weights of the twostacks of weights to maintain the latter in associated relation oragainst accidental displacement. The top of the closure at the center isprovided with a grip or handle 23, and after the screw rods 22 have beenapplied as shown by Fig. '3 the closure 21 is firmly secured to the baseand fully houses the testing mechanism and the latter through the mediumof the connected closure and base may be'readily transported from oneplace to another and when it is desired to use the testing mechanism theclosure 2-1 may be readily removed he screw bolts 22. It will thus beseen that the entire mechanism is portable and the several devicesconstituting the testing organization are of compact form and simplearrangement so that th inclosure and transportation thereof may bereadily effected.

The pressure pump 8 as shown is what is known as a plunger pump. andcomprises a base 29 in which the lower end of an upright barrel 30 issecured, said barrel having a cap 31 with ascrew-threaded vertical bore32 in which a screw plunger 33 is mounted and carries a piston 3% on itslower end working in the barrel. @n the upper end of the screw plunger33 is a hand bar or turn wheel 35 for operating the said plunger andpiston. The lower end of the barrel 3O communicates with a verticalpasbase 29, said passage intersecting oppositely extending passages and38, a three-way valve 39 being mounted at the point of intersection ofthe passages 36, 37 and 38, this valve having an ex teriorly locatedoperating handle 10, as shown by Fig. 2. The barrel 30 isalso providedwith a relief connection a1 extending down to the base 29 andcommunicating with a relief port 12 opening into the pas- 12 and 13 arerespecconnected to the outer terminals of and run to the pres- 9 ashereinbefore extively the passages 33 and 37 sure barrel or cylinderlained.

The pressure barrel or cylinder 9, as clearly shown by Fig. 4, isprovided with a base 43 and with a disk head il, and beween the saidhead and base a reservoir inclosure 5 is mounted, being secured at itsends respectively to the base and head in concentric relation to thebarrel or cylinder 9. Communicating with the reservoir wall or inclosure15 is a filling tube 16 which is disposed at an angle and is providedwith a closing plug 17. Through the medium of this tube the reservoir 10may be supplied with the pressure medium. The barrel or cylinder 9 has acentral bore 4:8 extending down into the base a3 and intersecting apassage 19 with which the T-coupling or union 1% connects, and at apredetermined elevation a horizontal drain port is formed in the barrelor cylinder 9 and opens into the reservoir 10. The upper end of thebarrel or cylinder 9 projects above the head it and is formed with abasin or cup 51, and therefrom a drain port 52 extends downwardly at anangle toward and communicates with the upper portion of the reservoir10. Within the bore 18 a plunger or piston 53 is mounted and has a diskor support 5% on its upper end which is designed for receiving variousweights 18. The base 43 also has an angular passage 55 communicatingwith the bottom of the reservoir and opening out through one end of thebase, the pipe 13 from the pressure pump 8 being connected to thispassage and by means of which the pressure medium is taken from thereservoir to the said pump and the latter gives the said medium therequisite pressure and forces the same into the pipe 12 and T-coupling14. into the passage 49 and thence into the bore a8 under the plunger orpiston 53. The pressure medium used is preferably oil, and the pressureimparted thereto by the pump 3 will be attained by first raising thescrew plunger 33 and piston 34: of this pump and then causing theplunger and piston to descend against the oil which has been drawn intothe barrel 30 by way of the pipe 13, the valve 39 being first turned toset up communication of the passage 37 with the passage 36 and the pumpbarrel 30 and shut otf communication between the passage 36 and thepassage 38. After the barrel 30 has been charged with oil from thereservoir 10 the valve 39 is then turned to set up communication betweenthe passage 36 and the passage 33, and by operating the screw plunger 33and the piston 31% in a downward direction against the oil in the barrel30 cumulative pressure is exerted on the oil and transmitted through thepassage 19 and bore 13 to the plunger 53 and also by way of the pipe 15to the gage testing connection 11. This gage testing connection 11 isprovided with a lower plug valve 56 at the intersection of the verticalbore 57 and the lateral passage 58 of said connection, this connectionbeing provided with a head 59 into which the bore 57 opens and suitablemeans whereby the gage to be tested may be attached or secured in areliable manner.

thereby and are plunger operated These gage attaching connections arewell known in the art and may be varied. in form the comblnation ofabase, pressure pump as may be found desirable. I

The weightsiare disposed or placed on e disk the plunger 53, the saidweights being so proportioned relativelyto the area of the plunger 53 asto give definitepressures to the oil below the plunger when they. are

placed according to the markings. thereon,-

and the main pressure on the oil is set up within the barrel 9 by, theresistance of the weight carrying plunger 53, together with the pressurepump 8 and the pressure developed by the downward movement of the"plunger 33 and piston 34: of the pressure pump will be applied to thebottom -.of the plunger 53 in the barrel 9, and as a consequence thepressure on the oil system will be Whatever is necessary to raisethesaid plunger 53 carrying weights on the disk or support 54. Theweight of the plunger-53 has such a ratio to its) size that with-noweights added five pounds pressure will raise the plunger and cause itto float on v In case the pump 8 is operated too long and causes theplunger 53 to rise above the port or vent 50, through this port backinto the reservoir 10, thereby preventing the plunger being raised toohigh andthrown out of. the barrel or cylinder 9. Any oil leaking pastthe plunger 53 will be deposited in the cup or basin 51' and drain'backthrough the port 52 into the upper portion of the reser--.

voir l0.

From the foregoing it will be seen that the plunger 53 carrying theweights and having the pressure applied to the bottom thereof will bedirect-acting and positive in its operation relatively to the gage to betested and attached to the connection 11, the number-of weights addedregulating the pressure necessary to sustain the plunger, thereby givinga positive pressure to the gage being tested.

y arranging the reservoir 10 around the working barrel 9 and providingthe drain port or vent 50 in the position shown and hereinbeforedescribed, a very advantageous construction results in that the partsare inaterially condensed in the space occupied quickly responsive inserving their several functions.

of gage testing apparatus isthat all the parts may be covered andtransported and held in position and form a self contained unit. Whilethe pump 8 has been particularly described as a screw pump to illustrateone practical form of the testing apparatus complete, it will beimderstood that other pumps maybe used that may be adapted for thepurpose.

or support 54 at the, upper end of for carrying: weights at its upperthe oil will be bypassed port (zommunicatin g A further Ina-j terialadvantage in the present arrangement protected and What is claimed is: Vr In a gage tester of the class-specified,

located adjacent to one extremity of the base, a connection-forthe gagetorbe tested adjacent to the opposite e tremitvv of'the base, anintermediatcly situated" plunger cylinder having. a: plunger with weightcarrying means and-a reservoirsurrounding the cylinder for the pressuremedium, tubular: connections between the pressure pump and the saidcylinder and reservoir andthe connection'for the gage, and a pluralityof vweights removably disposable on the weight'carrying means of theplunger.

- 2. In a gage tester of the the combination of-a pressure cylinderhaving a plunger therein provided with means extremity,

the pressure-cylinderhaving also a pressure medium reservoir surroundingthe same and drain ports between different" parts thereof and the saidreservoir, a pressure pump-connected to the pressure cylinder andreservoir, and afconnection for the gage to be tested'having pipecommunication with the plunpland cylinder.

, In-a gage tester of theclass specified, a pressure cylinder having avertical'bore and a' -eo-ncentric reservoir for the pressure medium, aplungermountedin the said bore and having aweight carrying meansatntheupper end thereof, the cylinder having a and the reservoir, and

tested having pipe attaching means with relation to thepressure cylinderand reservoir.

4. In a gage tester ofthe class specified, avpressure, cyllnder having avertical bore and surrounded by a reservoir, the cylinder having a basinat its upper extremity for with the boretherein pressure generatingmeans and a connection forthe gage to be a class specified,

leakage, a plungervertically movable in the bore and through the basinand having weight carrying means at its upper extremity, the cylinderhaving a port communicating with the bore thereof and another portcommunicating wit-h the basinand the reservoir, and pressure generatingand applyingmeans connected to the cylinder and reservoir.

5. In a gage tester of a pressure cylinder provided with a weightcarrying plunger and having a pressure medium reservoir surrounding thesame,

pressure generating and applying means connected to the cylinder andreservoir, and means for attaching thegage to be tested.

In a gagetester of the 01 thecombinationof a base having pressuregenerating means adjacent to one end, pressure applying means for ofgages to be tested adjacent to the opposite end of the base, anintermediate presass specified,

and the reservoir the "class specified, I

connection thereto 1 sure cylinder with a plunger and a surroundingreservoir connected to the pressure generating andv applying means, anda plurality of weights removably held between the pressure generatingmeans and the cylinder and reservoir and also between the latter and thepressure applying means.

7. In a gage tester of the class specified,-

the combination of a base having pressure generating means adjacent toone end, pressure applying means for connection thereto of gages to betested adjacent to the opposite end of the base, an intermediatepressure cylinder with a plunger and a surrounding reservoir connectedto the pressure generating and applying means, a plurality of weightsremovably held between the pressure generating means and the cylinderand reservoir and also between the latter and the pressure applyingmeans, and a closure removably secured to the base and completelyhousing the parts of the tester and provided with depending springs toengage the weights.

8. In a gage tester of the class specified, a base, a pressure cylinderprovided with a weight carrying plunger and surrounded by a pressuremedium reservoir, pressure generating and applying means connected tothe cylinder and reservoir, weights held between the pressure mediumreservoir and cylinder and the pressure generating and applying means,the weights being removand a closure removably fitted over the saidparts and connected to the base for completely housing the testermechanism and rendering the latter portable.

9. In a gage tester of the class specified, a base, a pressure cylinderprovided with weight carrying plunger and surrounded by a pressuremedium reservoir, pressure generating and applying means connected to.

the cylinder and reservoir, weights held between the pressure mediumreservoir an cylinder and the pressure generating and applying means,and a closure removably fitted over the said parts and connected to thebase for completely housing the tester mechanism and rendering thelatter portable, the closure having means for engaging and preventingdisplacement of the weights during transportation of the testermechanism.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JAMES P: FISHER.

Witnesses:

J. R. McGowan, H. E. RICHARDS.

Copies of this patent ma; be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

